#pragma once

//.hpp头文件，允许把声明和实现放在一起

#include <iostream>
#include <functional>
#include <vector>
#include <unistd.h>
#include <ctime>

//using task_t = std::functional<void()>;
typedef std::function<void()> task_t;

using namespace std;

void Download()
{
    cout << "我是一个下载任务" << ",处理者: "<< getpid() << endl;
}

void PrintLog()
{
    cout << "我是一个打印日志的任务" << ",处理者: "<< getpid() << endl;
}

void PushVideoStream()
{
    cout << "这是一个推送视频流的任务" << ",处理者: "<< getpid() << endl;
}

class Init
{
public:
    //任务集合
    vector<task_t> tasks;
    //任务码
    const static int g_download_code = 0;
    const static int g_printlog_code = 1;
    const static int g_push_videostream_code = 2;
public:
    Init()
    {
        tasks.push_back(Download);
        tasks.push_back(PrintLog);
        tasks.push_back(PushVideoStream);

        srand(time(nullptr) ^ getpid());
    }

    bool CheckSafe(int code)
    {
        if(code >= 0 && code < tasks.size())
            return true;
        else 
            return false;
    }

    void RunTask(int code)
    {
        tasks[code]();
    }

    int SelectTask()
    {
        return rand() % tasks.size();
    }

    string ToDesc(int code)
    {
        switch(code)
        {
            case g_download_code:
                return "Download";
            case g_printlog_code:
                return "PrintLog";
            case g_push_videostream_code:
                return "PushVideoStream";
            default:
                return "Unknow";
        }
    }
};

Init init;